yanno, when i think of casey the first things that i associate w/ her are: texts - computer - money - sex - driving.
if this girl was making money, above and beyond little 'gifts', then i think she was using a combination of the above.
beyond that i don't want to say coz i'm pretty sure i'll get a TO.
i know casey stole, but that doesn't mean she needed money. sociopaths are basically the poor 2nd cousins of psychopaths (if there's any difference at all) and psychopaths need no reason at all to steal. sometimes it's a cheap thrill, sometimes it's to show how clever they are and sometimes it's just something passing through their minds.
but always, if you have it and they can take it, they will.